alien_0 = {'color':'green','points':5}
print(alien_0['color'])
print(alien_0['points'])
print(alien_0)
alien_0['name'] = 'zhangsan'
alien_0['age']=10
print(alien_0)
alien_0["name"] = 'lisi'
print(alien_0)
del alien_0['age']
del alien_0['name']
print(alien_0)
for key,value in alien_0.items():
    print(key)
    print(value)